Improvement in the manufacture of glassware



. L. WAGNER.

MANUFACTURE OF GLASS-WARE.

N0.180,97Q. Patented. Aug. 8,1876.

Attest, 1121 1911 tor.

".PEI'ERS, PROTO-UTNOGRAPHER, WASHINGTON D O.

UNITED STATES PATENT OFFICE LOUIS WAGNER, OF WHEELING, WEST VIRGINIA,ASSIGNOR TO J. H. HOBBS BROOKUNIEB & 00., OF SAME PLACE.

IMPROVEMENT IN THE MANUFACTURE OF GLASSWARE.

Specification forming part of Letters Patent No. 180.970, dated August8, 1876; application filed July 27,1874.

To all whom it may concern:

Be it known that I, LOUIS WAGNER, of

] Wheeling, in the county of Ohio and State of West Virginia, haveinvented certain Improvements in the Manufacture of Glassware, of whichthe following is a specification My invention relates to stemmedarticles of glassware, and consists in forming the article in twopiecesthe one being the bowl and a portion of the stem, and the otherthe foot and a portion of the stemand uniting the two portions togetherat a welding-heat or in other appropriate manner, so that the joint liesin the stem between the bowl and the foot, instead of at the top of thestem, as heretofore.

The drawing represents a cup or goblet, in which A is the 'bowl, B thefoot, and O the stem.

In the ordinary method of forming the foot and stem in one piece andjoining the bowl to the top of the stem, the article almost invariablybreaks by any sudden change of temperature, and very often immediatelyafter finishing. The cause of this breakage is the unequal. expansionand contraction of the bowl and stem, and the necessary imperfection ofa joint formed between parts so difi'erent in shape and construction. Iobviate this by forming the bowl and a portion of the stemsay,as far asthe dotted line at G-in one piece, and the foot and lower part of thstem as far as the same dotted line C, in an other piece, and thenuniting the two, eithe in the ordinary manner by the use of third or awelding piece, or by the method 0 pressing together in a mold while in aplasti state, as described in J. H. Reighards re issued Patent 5,924, ofJune 16, 1874, whici latter I prefer, as it forms a more perfect joinThe two portions of the stem, being of equz size, shape, and density,will expand and cor tract equally, and consequently there will b nostrain from that cause on the joint. Thi location of the joint alsopermits the differen operations of manufacture to be effected witgreater facility, and, consequently, at a lowe cost than is possible bythe ordinary method and at the same time produces ware of grea' erstability.

Having thus described my invention, claim A stemmed article ofglassware, formed 1 two pieces, the upper consisting of the bov and aportion of the stem, and the lower 1 the foot and a portion of the stem,whe joined together at a point in the stem betwee the bowl and foot.

LOUIS WAGNER.

Witnesses:

JAY E. RATCLIFFE, JAMES Cox.

